The GCTech Graduated Compression Calf Sleeve uses medically researched compression technology that has been tested with elite athletes. They enhance performance, speed up recovery, reduce swelling, and assist rehabilitation. Designed by Consultant Vascular Surgeons and Textile Engineers, the calf sleeve has gold standard medical graded graduated compression that improves circulation to aid performance. Using graduated compression, the calf sleeve provides additional support at the ankle to reduce muscle fatigue. They provide post-exercise benefits also, if standing or sitting for prolonged periods and are known to have a significant anti-thrombotic (anti DVT) effect. The calf sleeve is constructed with an anatomical fit, and come in a range with calf sizes to maximize oxygen delivery and comfort. By being a sleeve, it allows you to carry on using your favourite running socks.